California Governor Gavin Newsom, a Democrat, told MSNBC that he plans to file suit Monday against the Trump administration to roll back the National Guard deployment, which he called “an illegal act, an immoral act, an unconstitutional act.”

Trump has cited a legal provision that allows him to mobilize federal service members when there is “a rebellion or danger of a rebellion against the authority of the Government of the United States.”

Roughly 300 National Guard members arrived in the city over the weekend, and Trump said he had authorized 2,000 members to deploy if needed.

What to know:

Troop deployment: Trump has invoked a legal provision allowing him to deploy federal service members when there is “a rebellion or danger of a rebellion against the authority of the Government of the United States.” Roughly 300 National Guard members arrived in the city over the weekend, and Trump said he had authorized 2,000 members to deploy if needed.Other protests: The Service Employees International Union says rallies are expected to take place Monday in Atlanta, Boston, Charlotte, Chicago, Denver, Harrisburg, New York City, Philadelphia, Pittsburgh, Portland, OR., Raleigh-Durham, Sacramento, San Francisco, Seattle and Washington DC, in addition to Los Angeles.

Travel ban: As tensions continue to rise over Trump’s immigration enforcement, the President’s new ban on travel to the U.S. by citizens from 12 mainly African and Middle Eastern countries is taking effect Monday.

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